Goro Ibuki is the creator of Jet Jaguar.
His role in the film begins shortly after the opening credits. He is first seen on shore watching his younger brother play in the lake while he and his friend Hiroshi Jinkawa enjoy lunch. An earthquake begins to drain the lake and Goro calls for his brother Rokuro to come ashore. Jinkawa drives the Ibukis home only for them to discover that Goro's laboratory had been broken into. Nothing is stolen, but some red sand is found near Jet Jaguar. Goro analyzes the sand to reveal that the sand is from 50 miles below sea level. The people who broke into his laboratory return and kidnap Goro and Rokuro, who awaken in a container that will be dumped in a river. The truck carrying the container overturns, spilling Goro and Rokuro. They are found by Jinkawa who had been following the truck. Goro then approaches the Military to get clearance for Jet Jaguar to get Godzilla to fight Megalon. The Military then joins Goro to recapture Jet Jaguar's main control system from the Seatopians. Goro is successful and after the final battle with Gigan and Megalon, he, Rokuro, and Hiroshi walk off with Jet Jaguar.